Yet LienShan 连山 and GuiChang 归藏 are said to be lost through time and deemed to have been incorporated into ZhouYi 周易 the forerunner of YiJing 易經, Many modern school uses ZhouYi 周易 especially deriving the concept of WenWang 周文王 LiuYaoGua 六爻卦 and apply them in XK 玄空, which technically may not be so correct.Yet there is another "classic" called SanFen 《 三 墳 》 that attempt to bring us closer if not further away from the truth regarding 3 Yi 三易. This scripture of the 3 tombs identify that there are: -

The story doesn't just end here. If you look at QianKun 乾坤 attributed to HuangDi 黃帝 it is more aptly closer to Early Heaven arrangement, attributed to FuXi 伏羲. The question remains are: -

Is the Early Heaven arrangement, attributed to HuangDi 黃帝 instead of FuXi 伏羲? Has the LienShan 连山, attributed to FuXi 伏羲 has been incorporated into the Early Heaven arrangement? Perhaps SanFen 《 三 墳 》 may shed some lights?